will a catback exhaust make my check engine light come on?

Asked by Dec 13, 2009 at 11:50 PM

Question type: Car Customization

6 Answers

80

whats it on?

that idiot light is for the engine. check your oil.

7,165

it can. the o2 sensor can cause problems

25

It depends on what its on. A pre-96 vehicle will probably not have an O2 sensor after the cat, and so shouldn't cause any problems. A post-96 most likely will have one, in which case it will cause the engine light to come on and the engine to run like $h!t.

80

yea it all depends on how many O2 sensors you got, if there is just one; go for it without worries. if there is any after the cat, then you need to incorperate them back into the system, preferably before the T pipe that is used to split the exhaust. that way it will stll read normal.

2008 cadillac sts-v

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